PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The noncondensable gases contain small amounts of butadiene and isoprene monomers, products of combustion: nitrogen, carbon dioxide, water vapor, and sulfur dioxide, in addition to combustible gases of hydrogen, methane, ethane, propane, hydrogen sulfide, and other organic vapors.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com